<?php
/**
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Esther Brunner <wikidesign@gmail.com>
 */

// must be run within Dokuwiki
if (!defined('DOKU_INC')) die();

if (!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');

require_once(DOKU_PLUGIN.'admin.php');
 
class admin_plugin_discussion extends DokuWiki_Admin_Plugin {
 
  function getInfo(){
    return array(
      'author' => 'Esther Brunner',
      'email'  => 'wikidesign@gmail.com',
      'date'   => '2007-08-22',
      'name'   => 'Discussion Plugin (admin component)',
      'desc'   => 'Moderate discussions',
      'url'    => 'http://www.wikidesign.ch/en/plugin/discussion/start',
    );
  }

  function getMenuSort(){ return 200; }
  function forAdminOnly(){ return false; }
  
  function handle(){
    global $lang;
    
    $cid = $_REQUEST['cid'];
    if (is_array($cid)) $cid = array_keys($cid);
    
    $action =& plugin_load('action', 'discussion');
    if (!$action) return; // couldn't load action plugin component
    
    switch ($_REQUEST['comment']){
      case $lang['btn_delete']:
        $action->_save($cid, '');
        break;
        
      case $this->getLang('btn_show'):
        $action->_save($cid, '', 'show');
        break;
        
      case $this->getLang('btn_hide'):
        $action->_save($cid, '', 'hide');
        break;
        
      case $this->getLang('btn_change'):
        $this->_changeStatus($_REQUEST['status']);
        break;
    }
  }

  function html(){
    global $conf;
    
    $first = $_REQUEST['first'];
    if (!is_numeric($first)) $first = 0;
    $num = $conf['recent'];
    
    ptln('<h1>'.$this->getLang('menu').'</h1>');
        
    $threads = $this->_getThreads();
    
    // slice the needed chunk of discussion pages
    $more = ((count($threads) > ($first + $num)) ? true : false);
    $threads = array_slice($threads, $first, $num);
    
    foreach ($threads as $thread){
      $comments = $this->_getComments($thread);
      $this->_threadHead($thread);
      if ($comments === false){
        ptln('</div>', 6); // class="level2"
        continue;
      }
      
      ptln('<form method="post" action="'.wl($thread['id']).'">', 8);
      ptln('<div class="no">', 10);
      ptln('<input type="hidden" name="do" value="admin" />', 10);
      ptln('<input type="hidden" name="page" value="discussion" />', 10);
      echo html_buildlist($comments, 'admin_discussion', array($this, '_commentItem'), array($this, '_li_comment'));
      $this->_actionButtons($thread['id']);
    }
    $this->_browseDiscussionLinks($more, $first, $num);
    
  }
  
  /**
   * Returns an array of pages with discussion sections, sorted by recent comments
   */
  function _getThreads(){
    global $conf;
    
    require_once(DOKU_INC.'inc/search.php');
            
    // returns the list of pages in the given namespace and it's subspaces
    $items = array();
    search($items, $conf['datadir'], 'search_allpages', '');
            
    // add pages with comments to result
    $result = array();
    foreach ($items as $item){
      $id = $item['id'];
      
      // some checks
      $file = metaFN($id, '.comments');
      if (!@file_exists($file)) continue; // skip if no comments file
      
      $date = filemtime($file);
      $result[$date] = array(
        'id'   => $id,
        'file' => $file,
        'date' => $date,
      );
    }
    
    // finally sort by time of last comment
    krsort($result);
          
    return $result;
  }
  
  /**
   * Outputs header, page ID and status of a discussion thread
   */
  function _threadHead($thread){
    $id = $thread['id'];
    
    $labels = array(
      0 => $this->getLang('off'),
      1 => $this->getLang('open'),
      2 => $this->getLang('closed')
    );
    $title = p_get_metadata($id, 'title');
    if (!$title) $title = $id;
    ptln('<h2 name="'.$id.'" id="'.$id.'">'.hsc($title).'</h2>', 6);
    ptln('<form method="post" action="'.wl($id).'">', 6);
    ptln('<div class="mediaright">', 8);
    ptln('<input type="hidden" name="do" value="admin" />', 10);
    ptln('<input type="hidden" name="page" value="discussion" />', 10);
    ptln($this->getLang('status').': <select name="status" size="1">', 10);
    foreach ($labels as $key => $label){
      $selected = (($key == $thread['status']) ? ' selected="selected"' : '');
      ptln('<option value="'.$key.'"'.$selected.'>'.$label.'</option>', 12);
    }
    ptln('</select> ', 10);
    ptln('<input type="submit" name="comment" value="'.$this->getLang('btn_change').'" class"button" title="'.$this->getLang('btn_change').'" />', 10);
    ptln('</div>', 8);
    ptln('</form>', 6);
    ptln('<div class="level2">', 6);
    ptln('<a href="'.wl($id).'" class="wikilink1">'.$id.'</a> ', 8);
    return true;
  }
  
  /**
   * Returns the full comments data for a given wiki page
   */
  function _getComments(&$thread){
    $id = $thread['id'];
    
    if (!$thread['file']) $thread['file'] = metaFN($id, '.comments');
    if (!@file_exists($thread['file'])) return false; // no discussion thread at all
    
    $data = unserialize(io_readFile($thread['file'], false));
    
    $thread['status'] = $data['status'];
    $thread['number'] = $data['number'];
    if (!$data['status']) return false;   // comments are turned off
    if (!$data['comments']) return false; // no comments
    
    $result = array();
    foreach ($data['comments'] as $cid => $comment){
      $this->_addComment($cid, $data, $result);
    }
    
    if (empty($result)) return false;
    else return $result;
  }
  
  /**
   * Recursive function to add the comment hierarchy to the result
   */
  function _addComment($cid, &$data, &$result, $parent = '', $level = 1){
    if (!is_array($data['comments'][$cid])) return; // corrupt datatype
    $comment = $data['comments'][$cid];
    if ($comment['parent'] != $parent) return;      // answer to another comment
    
    // okay, add the comment to the result
    $comment['id'] = $cid;
    $comment['level'] = $level;
    $result[] = $comment;
    
    // check answers to this comment
    if (count($comment['replies'])){
      foreach ($comment['replies'] as $rid){
        $this->_addComment($rid, $data, $result, $cid, $level + 1);
      }
    }
  }
    
  /**
   * Checkbox and info about a comment item
   */
  function _commentItem($comment){
    global $conf;
  
    // prepare variables
    if (is_array($comment['user'])){ // new format
      $name    = $comment['user']['name'];
      $mail    = $comment['user']['mail'];
    } else {                         // old format
      $name    = $comment['name'];
      $mail    = $comment['mail'];
    }
    if (is_array($comment['date'])){ // new format
      $created  = $comment['date']['created'];
    } else {                         // old format
      $created  = $comment['date'];
    }
    $abstract = preg_replace('/\s+?/', ' ', strip_tags($comment['xhtml']));
    if (utf8_strlen($abstract) > 160) $abstract = utf8_substr($abstract, 0, 160).'...';

    return '<input type="checkbox" name="cid['.$comment['id'].']" value="1" /> '.
      $this->email($mail, $name, 'email').', '.date($conf['dformat'], $created).': '.
      '<span class="abstract">'.$abstract.'</span>';
  }
  
  /**
   * list item tag
   */
  function _li_comment($comment){
    $show = ($comment['show'] ? '' : ' hidden');
    return '<li class="level'.$comment['level'].$show.'">';
  }
  
  /**
   * Show buttons to bulk remove, hide or show comments
   */
  function _actionButtons($id){
    global $lang;
    
    ptln('<div class="comment_buttons">', 12);
    ptln('<input type="submit" name="comment" value="'.$this->getLang('btn_show').'" class="button" title="'.$this->getLang('btn_show').'" />', 14);
    ptln('<input type="submit" name="comment" value="'.$this->getLang('btn_hide').'" class="button" title="'.$this->getLang('btn_hide').'" />', 14);
    ptln('<input type="submit" name="comment" value="'.$lang['btn_delete'].'" class="button" title="'.$lang['btn_delete'].'" />', 14);
    ptln('</div>', 12); // class="comment_buttons"
    ptln('</div>', 10); // class="no"
    ptln('</form>', 8);
    ptln('</div>', 6); // class="level2"
    return true;
  }
  
  /**
   * Displays links to older newer discussions
   */
  function _browseDiscussionLinks($more, $first, $num){
    global $ID;
    
    if (($first == 0) && (!$more)) return true;
    
    $params = array('do' => 'admin', 'page' => 'discussion');
    $last = $first+$num;
    ptln('<div class="level1">', 8);
    if ($first > 0){
      $first -= $num;
      if ($first < 0) $first = 0;
      $params['first'] = $first;
      ptln('<p class="centeralign">', 8);
      $ret = '<a href="'.wl($ID, $params).'" class="wikilink1">&lt;&lt; '.$this->getLang('newer').'</a>';
      if ($more){
        $ret .= ' | ';
      } else {
        ptln($ret, 10);
        ptln('</p>', 8);
      }
    } else if ($more){
      ptln('<p class="centeralign">', 8);
    }
    if ($more){
      $params['first'] = $last;
      $ret .= '<a href="'.wl($ID, $params).'" class="wikilink1">'.$this->getLang('older').' &gt;&gt;</a>';
      ptln($ret, 10);
      ptln('</p>', 8);
    }
    ptln('</div>', 6); // class="level1"
    return true;
  }
    
  /**
   * Changes the status of a comment
   */
  function _changeStatus($new){
    global $ID;
    
    // get discussion meta file name
    $file = metaFN($ID, '.comments');
    $data = unserialize(io_readFile($file, false));
    
    $old = $data['status'];
    if ($old == $new) return true;
    
    // save the comment metadata file
    $data['status'] = $new;
    io_saveFile($file, serialize($data));
    
    // look for ~~DISCUSSION~~ command in page file and change it accordingly
    $patterns = array('~~DISCUSSION:off\2~~', '~~DISCUSSION\2~~', '~~DISCUSSION:closed\2~~');
    $replace = $patterns[$new];
    $wiki = preg_replace('/~~DISCUSSION([\w:]*)(\|?.*?)~~/', $replace, rawWiki($ID));
    saveWikiText($ID, $wiki, $this->getLang('statuschanged'), true);
    
    return true;
  }
    	
}

//Setup VIM: ex: et ts=4 enc=utf-8 :